CVE-2019-19126 · cross-distro fix matrix

CVE-2019-19126: On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2019-19126 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

glibc→ fixed in2.29-8urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y glibc
```

Debian bookworm

Source: Debian Security Tracker

glibc→ fixed in2.29-8urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y glibc
```

Debian trixie

Source: Debian Security Tracker

glibc→ fixed in2.29-8urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y glibc
```

Are YOU affected by CVE-2019-19126?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

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